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Date:   Fri, 7 Dec 2018 12:24:34 -0800
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Qian Cai <cai@lca.pw>
Cc:     linux-kernel@vger.kernel.org
Subject: Re: [PATCH] checkstack.pl: fix for aarch64
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On Fri,  7 Dec 2018 14:58:43 -0500 Qian Cai <cai@lca.pw> wrote:

> There is actually a space after "sp," like this,
> 
> ffff2000080813c8:       a9bb7bfd        stp     x29, x30, [sp, #-80]!
> 

Confused.  Why does this matter?  Why is the patched version superior?